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OH2 is a unique combination of two proven active ingredients oxyfluorfen and pendimethalin. Ideal for use on container-grown ornamental trees and shrubs, contained garden beds and pots and field-grown ornamental plants. OH2 is a pre-emergent herbicide specially designed for nurseries and landscaping to control weeds in many growing situations. It has been tested for safety on over 100 ornamental crops. It is the safest and most reliable pre-emergent herbicide to apply to containerized plants. OH2 adheres to the surface of growing media and soil. It is non-mobile, so will not leach in sensitive growing environments. OH2's effectiveness at half the application rate of alternative herbicide
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Controls most grassy and broadleaf weeds with a single application
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Effective on many of the most intrusive weeds including chickweed, common groundsel, pigweed, dandelion, oxalis, and spurge
Newly-transplanted container or field nursery stock
- Apply after cuttings form roots and are established.
- To avoid inhibition of the tissue union, apply before budding/grafting or after buds/grafts have taken.
- Do not apply to wet foliage or to pots less than six inches wide.
Established container, field nursery stock, or landscape plants
- Apply at any time as an over-the-top, or soil directed application.
Landscape (or ornamental) plantings
- Apply as an over-the-top, or as a soil directed application.
- Delay applications to newly transplanted ornamentals until soil has settled around transplants.
Bare ground application for container placement
- Apply to soil (including mulch, gravel, wood chips, or other permeable base) upon which containerized ornamentals are placed.
- After application, use a post-emergence herbicide to control break though weeds.
- If necessary, perform shallow cultivation or hand weeding to avoid disturbing the herbicide barrier.
Shadehouses and uncovered polyhouses
- Plants must receive two irrigations totaling at least 0.5 inches of water before covering.
- After application, houses must remain uncovered for at least 21 days.
Ornamental bulbs (not for use on ornamental bulbs grown for commercial production in California)
- Apply before bulbs emerge.
- Do not re-apply after emergence.
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